package com.stu.config;

import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * @author MI
 * @ClassName GlobalResponseHandler.java
 * @createTime 2021年12月07日 15:24:00
 * 对返回结果进行加工
 */
//@ControllerAdvice(annotations = {Controller.class, RestController.class})
public class GlobalResponseHandler implements ResponseBodyAdvice<Object> {

    /**
     * Whether this component supports the given controller method return type
     * and the selected {@code HttpMessageConverter} type.
     *
     * @param returnType    the return type
     * @param converterType the selected converter type
     * @return {@code true} if {@link #beforeBodyWrite} should be invoked;
     * {@code false} otherwise
     */
    @Override
    public boolean supports(MethodParameter returnType,Class<? extends HttpMessageConverter<?>> converterType) {
        return false;
    }

    /**
     * Invoked after an {@code HttpMessageConverter} is selected and just before
     * its write method is invoked.
     *
     * @param body                  the body to be written
     * @param returnType            the return type of the controller method
     * @param selectedContentType   the content type selected through content negotiation
     * @param selectedConverterType the converter type selected to write to the response
     * @param request               the current request
     * @param response              the current response
     * @return the body that was passed in or a modified (possibly new) instance
     */
    @Override
    public Object beforeBodyWrite(Object body,MethodParameter returnType,MediaType selectedContentType,Class<? extends HttpMessageConverter<?>> selectedConverterType,ServerHttpRequest request,ServerHttpResponse response) {

        return null;
    }
}
